The G5.BT series is bidirectional regenerative. It was developed specifically for testing energy storage devices and is suitable for use in laboratories and on test benches. The modular and finely graded G5.BT series is characterized by highly dynamic response times and a wide current-voltage range with an auto-ranging factor 3. The G5.BT series has an outstanding current accuracy of <0.02% FS, an additional high-resolution current measurement range, and a fast current rise time in the 100 μs range. Ripple modulation, an integrated safety relay for PL c according to EN ISO 13849 and a powerful CAN multi-protocol interface (1 kHz, 16 bit) as well as functions to avoid reverse-polarity problems, current surges, and unwanted deep discharges make the G5.BT series the ideal, versatile battery module and battery pack tester.